1) - dissolving ammonium nitrate in water to cool the water.
2) Pressure
3) - a liquid with a high specific heat
4) -Melting ice cubes
5) - the enthalpy is positive
To solve the problem we will use the following equation:
n(Li) = N(Li) / NA
n - the number of moles
N - the number of particles
NA - Avogadro's number that has following value: 6.022×10²³ mol⁻¹
From the upper relation follows:
N(Li) = n(Li) × NA
N(Li) = 1mole × 6.022×10²³ mol⁻¹ = 6.022×10²³ atoms of <span>lithium</span>
Answer: Volume of the balloon at this altitude is 46.9 L
Explanation:
Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.
The combined gas equation is,
![\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}](https://tex.z-dn.net/?f=%5Cfrac%7BP_1V_1%7D%7BT_1%7D%3D%5Cfrac%7BP_2V_2%7D%7BT_2%7D)
where,
= initial pressure of gas = 737 mm Hg
= final pressure of gas = 385 mm Hg
= initial volume of gas = 28.6 L
= final volume of gas = ?
= initial temperature of gas = ![26.8^oC=273+26.8=299.8K](https://tex.z-dn.net/?f=26.8%5EoC%3D273%2B26.8%3D299.8K)
= final temperature of gas = ![-16.3^oC=273-16.3=256.7K](https://tex.z-dn.net/?f=-16.3%5EoC%3D273-16.3%3D256.7K)
Now put all the given values in the above equation, we get:
![\frac{737\times 28.6}{299.8}=\frac{385\times V_2}{256.7}](https://tex.z-dn.net/?f=%5Cfrac%7B737%5Ctimes%2028.6%7D%7B299.8%7D%3D%5Cfrac%7B385%5Ctimes%20V_2%7D%7B256.7%7D)
![V_2=46.9L](https://tex.z-dn.net/?f=V_2%3D46.9L)
Thus the volume of the balloon at this altitude is 46.9 L
Answer:
1.8 L
Explanation:
Given data:
Initial volume of gas = 4.2 L
Initial pressure of gas = 101 kpa
Final volume of gas = ?
Final pressure of gas = 235 kpa
Solution:
The given problem will be solved through the Boly's law,
"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"
Mathematical expression:
P₁V₁ = P₂V₂
P₁ = Initial pressure
V₁ = initial volume
P₂ = final pressure
V₂ = final volume
Now we will put the values in formula,
P₁V₁ = P₂V₂
101 kpa × 4.2 L = 235 kpa × V₂
V₂ = 424.2 kpa . L/ 235 kpa
V₂ = 1.8 L
So when pressure is increased the volume of gas becomes 1,8 L.
Baking soda is a basic compound called sodium bicarbonate. Vinegar is a diluted solution that contains acetic acid. The baking soda and vinegar reaction is actually two separate reactions. ... The carbonic acid formed as a result of the first reaction immediately begins to decompose into water and carbon dioxide gas.